u/Altruistic-Loquat-49

I'm a current first-year biology major trying to switch to physiological science. I thought I had to fill out a major change petition and send it to the department, which I did, but they said that 1) I don't need to fill out a petition to switch within the College and 2) "in order to switch into the major, students are required to complete the preparation coursework" and she listed the typical LS prerequisites that are the same for bio. Obviously, I haven't completed all of these classes yet, but I'm confused because I thought I could still switch while taking the prerequisites, and that it was better to switch in your first two years? By the looks of it, the earliest I could switch is my Junior year???? Does anyone have any insight on this??